78181052 has 12 divisors (see below), whose sum is σ = 139998936. Its totient is φ = 38181360.

The previous prime is 78181021. The next prime is 78181057. The reversal of 78181052 is 25018187.

It is a happy number.

It is a super-2 number, since 2×78181052² = 12224553783653408, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78181057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227099 + ... + 227442.

It is an arithmetic number, because the mean of its divisors is an integer number (11666578).

Almost surely, 2^78181052 is an apocalyptic number.

It is an amenable number.

78181052 is a deficient number, since it is larger than the sum of its proper divisors (61817884).

78181052 is a wasteful number, since it uses less digits than its factorization.

78181052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454588 (or 454586 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 78181052 is about 8842.0049762483. The cubic root of 78181052 is about 427.5961996382.

The spelling of 78181052 in words is "seventy-eight million, one hundred eighty-one thousand, fifty-two".