400747775 has 12 divisors (see below), whose sum is σ = 497699544. Its totient is φ = 320100000.

The previous prime is 400747759. The next prime is 400747793. The reversal of 400747775 is 577747004.

It is not a de Polignac number, because 400747775 - 2⁴ = 400747759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4400 + ... + 28650.

It is an arithmetic number, because the mean of its divisors is an integer number (41474962).

Almost surely, 2^400747775 is an apocalyptic number.

400747775 is a deficient number, since it is larger than the sum of its proper divisors (96951769).

400747775 is a wasteful number, since it uses less digits than its factorization.

400747775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24922 (or 24917 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 41.

The square root of 400747775 is about 20018.6856461657. The cubic root of 400747775 is about 737.2651516907.

The spelling of 400747775 in words is "four hundred million, seven hundred forty-seven thousand, seven hundred seventy-five".