78363520 has 32 divisors (see below), whose sum is σ = 187339320. Its totient is φ = 31345152.

The previous prime is 78363511. The next prime is 78363541. The reversal of 78363520 is 2536387.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×78363520² = 12281682533580800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60582 + ... + 61861.

Almost surely, 2^78363520 is an apocalyptic number.

It is an amenable number.

78363520 is an abundant number, since it is smaller than the sum of its proper divisors (108975800).

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

78363520 is a wasteful number, since it uses less digits than its factorization.

78363520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122462 (or 122450 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 78363520 is about 8852.3172107646. The cubic root of 78363520 is about 427.9285990305.

The spelling of 78363520 in words is "seventy-eight million, three hundred sixty-three thousand, five hundred twenty".