78149782 has 16 divisors (see below), whose sum is σ = 124431552. Its totient is φ = 36684160.

The previous prime is 78149779. The next prime is 78149801. The reversal of 78149782 is 28794187.

It is a super-2 number, since 2×78149782² = 12214776853295048, which contains 22 as substring.

It is a congruent number.

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, 11988 + ... + 17320.

It is an arithmetic number, because the mean of its divisors is an integer number (7776972).

Almost surely, 2^78149782 is an apocalyptic number.

78149782 is a deficient number, since it is larger than the sum of its proper divisors (46281770).

78149782 is a wasteful number, since it uses less digits than its factorization.

78149782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783.

The product of its digits is 225792, while the sum is 46.

The square root of 78149782 is about 8840.2365352970. The cubic root of 78149782 is about 427.5391836227.

The spelling of 78149782 in words is "seventy-eight million, one hundred forty-nine thousand, seven hundred eighty-two".