78994490 has 16 divisors (see below), whose sum is σ = 142987680. Its totient is φ = 31420560.

The previous prime is 78994459. The next prime is 78994523. The reversal of 78994490 is 9449987.

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, 20276 + ... + 23855.

It is an arithmetic number, because the mean of its divisors is an integer number (8936730).

Almost surely, 2^78994490 is an apocalyptic number.

78994490 is a deficient number, since it is larger than the sum of its proper divisors (63993190).

78994490 is a wasteful number, since it uses less digits than its factorization.

78994490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44317.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 78994490 is about 8887.8844501940. The cubic root of 78994490 is about 429.0740667193.

The spelling of 78994490 in words is "seventy-eight million, nine hundred ninety-four thousand, four hundred ninety".