61077240 has 160 divisors (see below), whose sum is σ = 234701280. Its totient is φ = 13955328.

The previous prime is 61077227. The next prime is 61077251. The reversal of 61077240 is 4277016.

61077240 is a `hidden beast` number, since 610 + 7 + 7 + 2 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21334 + ... + 24026.

It is an arithmetic number, because the mean of its divisors is an integer number (1466883).

Almost surely, 2^61077240 is an apocalyptic number.

61077240 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 61077240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117350640).

61077240 is an abundant number, since it is smaller than the sum of its proper divisors (173624040).

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

61077240 is a wasteful number, since it uses less digits than its factorization.

61077240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 61077240 is about 7815.1928958919. The cubic root of 61077240 is about 393.8157985278.

The spelling of 61077240 in words is "sixty-one million, seventy-seven thousand, two hundred forty".