78967690 has 8 divisors (see below), whose sum is σ = 142141860. Its totient is φ = 31587072.

The previous prime is 78967639. The next prime is 78967697. The reversal of 78967690 is 9676987.

It can be written as a sum of positive squares in 2 ways, for example, as 78481881 + 485809 = 8859^2 + 697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78967690² = 12471792127872200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78967697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3948375 + ... + 3948394.

Almost surely, 2^78967690 is an apocalyptic number.

78967690 is a deficient number, since it is larger than the sum of its proper divisors (63174170).

78967690 is a wasteful number, since it uses less digits than its factorization.

78967690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896776.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 78967690 is about 8886.3766519319. The cubic root of 78967690 is about 429.0255380787.

The spelling of 78967690 in words is "seventy-eight million, nine hundred sixty-seven thousand, six hundred ninety".