78115552 has 12 divisors (see below), whose sum is σ = 153790056. Its totient is φ = 39057760.

The previous prime is 78115529. The next prime is 78115553. The reversal of 78115552 is 25551187.

It is a super-2 number, since 2×78115552² = 12204078928529408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78115553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220524 + ... + 1220587.

It is an arithmetic number, because the mean of its divisors is an integer number (12815838).

Almost surely, 2^78115552 is an apocalyptic number.

It is an amenable number.

78115552 is a deficient number, since it is larger than the sum of its proper divisors (75674504).

78115552 is a wasteful number, since it uses less digits than its factorization.

78115552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441121 (or 2441113 counting only the distinct ones).

The product of its digits is 14000, while the sum is 34.

The square root of 78115552 is about 8838.3002890827. The cubic root of 78115552 is about 427.4767530648.

The spelling of 78115552 in words is "seventy-eight million, one hundred fifteen thousand, five hundred fifty-two".