78761994 has 16 divisors (see below), whose sum is σ = 158034240. Its totient is φ = 26168960.

The previous prime is 78761981. The next prime is 78762001. The reversal of 78761994 is 49916787.

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, 19239 + ... + 22970.

It is an arithmetic number, because the mean of its divisors is an integer number (9877140).

Almost surely, 2^78761994 is an apocalyptic number.

78761994 is an abundant number, since it is smaller than the sum of its proper divisors (79272246).

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

78761994 is a wasteful number, since it uses less digits than its factorization.

78761994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42525.

The product of its digits is 762048, while the sum is 51.

The square root of 78761994 is about 8874.7954342621. The cubic root of 78761994 is about 428.6527038556.

It can be divided in two parts, 7876 and 1994, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 78761994 in words is "seventy-eight million, seven hundred sixty-one thousand, nine hundred ninety-four".