726434136 has 64 divisors (see below), whose sum is σ = 2020207200. Its totient is φ = 241864704.

The previous prime is 726434101. The next prime is 726434147. The reversal of 726434136 is 631434627.

726434136 = 1² + 2² + ... + 1296².

It is a happy number.

726434136 is a `hidden beast` number, since 7 + 2 + 643 + 4 + 1 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 726434136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278856 + ... + 281448.

Almost surely, 2^726434136 is an apocalyptic number.

It is an amenable number.

726434136 is an abundant number, since it is smaller than the sum of its proper divisors (1293773064).

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

726434136 is a wasteful number, since it uses less digits than its factorization.

726434136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3905 (or 3895 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 726434136 is about 26952.4421156970. The cubic root of 726434136 is about 898.9428476294.

The spelling of 726434136 in words is "seven hundred twenty-six million, four hundred thirty-four thousand, one hundred thirty-six".