745800820 has 12 divisors (see below), whose sum is σ = 1566181764. Its totient is φ = 298320320.

The previous prime is 745800817. The next prime is 745800833. The reversal of 745800820 is 28008547.

It can be written as a sum of positive squares in 2 ways, for example, as 279759076 + 466041744 = 16726^2 + 21588^2 .

It is a super-2 number, since 2×745800820² = 1112437726225344800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18645001 + ... + 18645040.

It is an arithmetic number, because the mean of its divisors is an integer number (130515147).

Almost surely, 2^745800820 is an apocalyptic number.

It is an amenable number.

745800820 is an abundant number, since it is smaller than the sum of its proper divisors (820380944).

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

745800820 is a wasteful number, since it uses less digits than its factorization.

745800820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37290050 (or 37290048 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 745800820 is about 27309.3540751150. The cubic root of 745800820 is about 906.8614738437.

The spelling of 745800820 in words is "seven hundred forty-five million, eight hundred thousand, eight hundred twenty".