78378508 has 24 divisors (see below), whose sum is σ = 151152848. Its totient is φ = 35332416.

The previous prime is 78378499. The next prime is 78378529. The reversal of 78378508 is 80587387.

It is a super-2 number, since 2×78378508² = 12286381032612128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15291 + ... + 19762.

Almost surely, 2^78378508 is an apocalyptic number.

It is an amenable number.

78378508 is a deficient number, since it is larger than the sum of its proper divisors (72774340).

78378508 is a wasteful number, since it uses less digits than its factorization.

78378508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35113 (or 35111 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 78378508 is about 8853.1637282951. The cubic root of 78378508 is about 427.9558795176.

The spelling of 78378508 in words is "seventy-eight million, three hundred seventy-eight thousand, five hundred eight".