78200731 has 16 divisors (see below), whose sum is σ = 95034816. Its totient is φ = 62816256.

The previous prime is 78200687. The next prime is 78200737. The reversal of 78200731 is 13700287.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78200731 - 2¹³ = 78192539 is a prime.

It is a super-2 number, since 2×78200731² = 12230708657868722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78200731.

It is not an unprimeable number, because it can be changed into a prime (78200737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29305 + ... + 31861.

It is an arithmetic number, because the mean of its divisors is an integer number (5939676).

Almost surely, 2^78200731 is an apocalyptic number.

78200731 is a deficient number, since it is larger than the sum of its proper divisors (16834085).

78200731 is a wasteful number, since it uses less digits than its factorization.

78200731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 78200731 is about 8843.1177194471. The cubic root of 78200731 is about 427.6320734613.

The spelling of 78200731 in words is "seventy-eight million, two hundred thousand, seven hundred thirty-one".