78902 has 4 divisors (see below), whose sum is σ = 118356. Its totient is φ = 39450.

The previous prime is 78901. The next prime is 78919. The reversal of 78902 is 20987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20987 = 31 ⋅677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19724 + ... + 19727.

It is an arithmetic number, because the mean of its divisors is an integer number (29589).

2⁷⁸⁹⁰² is an apocalyptic number.

78902 is a deficient number, since it is larger than the sum of its proper divisors (39454).

78902 is a wasteful number, since it uses less digits than its factorization.

78902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39453.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 78902 is about 280.8949981755. The cubic root of 78902 is about 42.8906542129.

The spelling of 78902 in words is "seventy-eight thousand, nine hundred two".