61374240 has 96 divisors (see below), whose sum is σ = 214824960. Its totient is φ = 16365312.

The previous prime is 61374223. The next prime is 61374241. The reversal of 61374240 is 4247316.

61374240 is a `hidden beast` number, since 613 + 7 + 4 + 2 + 40 = 666.

61374240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61374241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2784 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^61374240 is an apocalyptic number.

61374240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61374240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107412480).

61374240 is an abundant number, since it is smaller than the sum of its proper divisors (153450720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61374240 is a wasteful number, since it uses less digits than its factorization.

61374240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14231 (or 14217 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 61374240 is about 7834.1713026969. The cubic root of 61374240 is about 394.4531020310.

The spelling of 61374240 in words is "sixty-one million, three hundred seventy-four thousand, two hundred forty".