726357420 has 72 divisors (see below), whose sum is σ = 2207652720. Its totient is φ = 193311360.

The previous prime is 726357389. The next prime is 726357451. The reversal of 726357420 is 24753627.

It is a happy number.

726357420 is a `hidden beast` number, since 7 + 2 + 63 + 574 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (726357389) and next prime (726357451).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93651 + ... + 101109.

Almost surely, 2^726357420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726357420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103826360).

726357420 is an abundant number, since it is smaller than the sum of its proper divisors (1481295300).

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

726357420 is a wasteful number, since it uses less digits than its factorization.

726357420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015 (or 8010 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 726357420 is about 26951.0189046722. The cubic root of 726357420 is about 898.9112018481.

The spelling of 726357420 in words is "seven hundred twenty-six million, three hundred fifty-seven thousand, four hundred twenty".