78764238 has 40 divisors (see below), whose sum is σ = 201706032. Its totient is φ = 22503744.

The previous prime is 78764221. The next prime is 78764249. The reversal of 78764238 is 83246787.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78764193 and 78764202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33595 + ... + 35862.

Almost surely, 2^78764238 is an apocalyptic number.

78764238 is an abundant number, since it is smaller than the sum of its proper divisors (122941794).

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

78764238 is a wasteful number, since it uses less digits than its factorization.

78764238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69478 (or 69469 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 78764238 is about 8874.9218588109. The cubic root of 78764238 is about 428.6567747172.

It can be divided in two parts, 787 and 64238, that added together give a square (65025 = 255²).

The spelling of 78764238 in words is "seventy-eight million, seven hundred sixty-four thousand, two hundred thirty-eight".