78827690 has 16 divisors (see below), whose sum is σ = 142065792. Its totient is φ = 31491984.

The previous prime is 78827689. The next prime is 78827719. The reversal of 78827690 is 9672887.

It is a super-2 number, since 2×78827690² = 12427609421472200, 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, 4427 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (8879112).

Almost surely, 2^78827690 is an apocalyptic number.

78827690 is a deficient number, since it is larger than the sum of its proper divisors (63238102).

78827690 is a wasteful number, since it uses less digits than its factorization.

78827690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9781.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 78827690 is about 8878.4959311811. The cubic root of 78827690 is about 428.7718516007.

The spelling of 78827690 in words is "seventy-eight million, eight hundred twenty-seven thousand, six hundred ninety".