78537438 has 40 divisors (see below), whose sum is σ = 201125232. Its totient is φ = 22438944.

The previous prime is 78537419. The next prime is 78537451. The reversal of 78537438 is 83473587.

78537438 is a `hidden beast` number, since 78 + 537 + 43 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 78537393 and 78537402.

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, 33495 + ... + 35762.

Almost surely, 2^78537438 is an apocalyptic number.

78537438 is an abundant number, since it is smaller than the sum of its proper divisors (122587794).

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

78537438 is a wasteful number, since it uses less digits than its factorization.

78537438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69278 (or 69269 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 78537438 is about 8862.1350700607. The cubic root of 78537438 is about 428.2449430609.

The spelling of 78537438 in words is "seventy-eight million, five hundred thirty-seven thousand, four hundred thirty-eight".