61253784 has 96 divisors (see below), whose sum is σ = 177016320. Its totient is φ = 19090368.

The previous prime is 61253783. The next prime is 61253809. The reversal of 61253784 is 48735216.

61253784 is a `hidden beast` number, since 612 + 5 + 37 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61253783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77439 + ... + 78225.

It is an arithmetic number, because the mean of its divisors is an integer number (1843920).

Almost surely, 2^61253784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61253784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88508160).

61253784 is an abundant number, since it is smaller than the sum of its proper divisors (115762536).

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

61253784 is a wasteful number, since it uses less digits than its factorization.

61253784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 862 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 61253784 is about 7826.4796684078. The cubic root of 61253784 is about 394.1948755538.

The spelling of 61253784 in words is "sixty-one million, two hundred fifty-three thousand, seven hundred eighty-four".