78162940 has 36 divisors (see below), whose sum is σ = 174378456. Its totient is φ = 29423872.

The previous prime is 78162883. The next prime is 78162971. The reversal of 78162940 is 4926187.

It is a super-2 number, since 2×78162940² = 12218890378887200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78162940.

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, 982 + ... + 12541.

It is an arithmetic number, because the mean of its divisors is an integer number (4843846).

Almost surely, 2^78162940 is an apocalyptic number.

It is an amenable number.

78162940 is an abundant number, since it is smaller than the sum of its proper divisors (96215516).

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

78162940 is a wasteful number, since it uses less digits than its factorization.

78162940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13566 (or 13547 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 78162940 is about 8840.9807148302. The cubic root of 78162940 is about 427.5631770566.

The spelling of 78162940 in words is "seventy-eight million, one hundred sixty-two thousand, nine hundred forty".