78370540 has 24 divisors (see below), whose sum is σ = 165421872. Its totient is φ = 31187520.

The previous prime is 78370531. The next prime is 78370541. The reversal of 78370540 is 4507387.

It is a super-2 number, since 2×78370540² = 12283883079783200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78370496 and 78370505.

It is not an unprimeable number, because it can be changed into a prime (78370541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6006 + ... + 13885.

It is an arithmetic number, because the mean of its divisors is an integer number (6892578).

Almost surely, 2^78370540 is an apocalyptic number.

It is an amenable number.

78370540 is an abundant number, since it is smaller than the sum of its proper divisors (87051332).

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

78370540 is a wasteful number, since it uses less digits than its factorization.

78370540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20097 (or 20095 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 78370540 is about 8852.7137082366. The cubic root of 78370540 is about 427.9413769535.

The spelling of 78370540 in words is "seventy-eight million, three hundred seventy thousand, five hundred forty".