726961905 has 32 divisors (see below), whose sum is σ = 1368403200. Its totient is φ = 364905216.

The previous prime is 726961901. The next prime is 726961933. The reversal of 726961905 is 509169627.

It is a happy number.

726961905 is a `hidden beast` number, since 7 + 26 + 9 + 619 + 0 + 5 = 666.

It is not a de Polignac number, because 726961905 - 2² = 726961901 is a prime.

It is a super-2 number, since 2×726961905² = 1056947222642458050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (726961901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156085 + ... + 160674.

It is an arithmetic number, because the mean of its divisors is an integer number (42762600).

Almost surely, 2^726961905 is an apocalyptic number.

It is an amenable number.

726961905 is a deficient number, since it is larger than the sum of its proper divisors (641441295).

726961905 is a wasteful number, since it uses less digits than its factorization.

726961905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316790 (or 316784 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 726961905 is about 26962.2310834990. The cubic root of 726961905 is about 899.1604949449.

The spelling of 726961905 in words is "seven hundred twenty-six million, nine hundred sixty-one thousand, nine hundred five".