725071806 has 24 divisors (see below), whose sum is σ = 1653673320. Its totient is φ = 228969936.

The previous prime is 725071793. The next prime is 725071807. The reversal of 725071806 is 608170527.

725071806 is a `hidden beast` number, since 72 + 507 + 1 + 80 + 6 = 666.

It is a super-2 number, since 2×725071806² = 1051458247712203272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725071807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1059705 + ... + 1060388.

It is an arithmetic number, because the mean of its divisors is an integer number (68903055).

Almost surely, 2^725071806 is an apocalyptic number.

725071806 is an abundant number, since it is smaller than the sum of its proper divisors (928601514).

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

725071806 is a wasteful number, since it uses less digits than its factorization.

725071806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120120 (or 2120117 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 725071806 is about 26927.1574066035. The cubic root of 725071806 is about 898.3805469759.

The spelling of 725071806 in words is "seven hundred twenty-five million, seventy-one thousand, eight hundred six".