78342516 has 36 divisors (see below), whose sum is σ = 226323552. Its totient is φ = 22383504.

The previous prime is 78342499. The next prime is 78342553. The reversal of 78342516 is 61524387.

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

It is a super-2 number, since 2×78342516² = 12275099626420512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (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, 155190 + ... + 155693.

Almost surely, 2^78342516 is an apocalyptic number.

It is an amenable number.

78342516 is an abundant number, since it is smaller than the sum of its proper divisors (147981036).

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

78342516 is a wasteful number, since it uses less digits than its factorization.

78342516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310900 (or 310895 counting only the distinct ones).

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

The square root of 78342516 is about 8851.1307752174. The cubic root of 78342516 is about 427.8903626357.

The spelling of 78342516 in words is "seventy-eight million, three hundred forty-two thousand, five hundred sixteen".