78961942 has 16 divisors (see below), whose sum is σ = 121201920. Its totient is φ = 38569768.

The previous prime is 78961937. The next prime is 78961951. The reversal of 78961942 is 24916987.

It is a super-2 number, since 2×78961942² = 12469976568822728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78961892 and 78961901.

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, 17703 + ... + 21709.

It is an arithmetic number, because the mean of its divisors is an integer number (7575120).

Almost surely, 2^78961942 is an apocalyptic number.

78961942 is a deficient number, since it is larger than the sum of its proper divisors (42239978).

78961942 is a wasteful number, since it uses less digits than its factorization.

78961942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235.

The product of its digits is 217728, while the sum is 46.

The square root of 78961942 is about 8886.0532296403. The cubic root of 78961942 is about 429.0151283418.

The spelling of 78961942 in words is "seventy-eight million, nine hundred sixty-one thousand, nine hundred forty-two".