61857396 has 36 divisors (see below), whose sum is σ = 163162272. Its totient is φ = 19722384.

The previous prime is 61857329. The next prime is 61857421. The reversal of 61857396 is 69375816.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36526 + ... + 38181.

Almost surely, 2^61857396 is an apocalyptic number.

It is an amenable number.

61857396 is an abundant number, since it is smaller than the sum of its proper divisors (101304876).

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

61857396 is a wasteful number, since it uses less digits than its factorization.

61857396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74740 (or 74735 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 61857396 is about 7864.9472979798. The cubic root of 61857396 is about 395.4854811528.

The spelling of 61857396 in words is "sixty-one million, eight hundred fifty-seven thousand, three hundred ninety-six".