400962661 has 6 divisors (see below), whose sum is σ = 440727686. Its totient is φ = 364511400.

The previous prime is 400962637. The next prime is 400962721. The reversal of 400962661 is 166269004.

It can be written as a sum of positive squares in only one way, i.e., 368870436 + 32092225 = 19206^2 + 5665^2 .

It is not a de Polignac number, because 400962661 - 2¹⁷ = 400831589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400962061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1656750 + ... + 1656991.

Almost surely, 2^400962661 is an apocalyptic number.

It is an amenable number.

400962661 is a deficient number, since it is larger than the sum of its proper divisors (39765025).

400962661 is a wasteful number, since it uses less digits than its factorization.

400962661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313763 (or 3313752 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 400962661 is about 20024.0520624573. The cubic root of 400962661 is about 737.3969050950.

The spelling of 400962661 in words is "four hundred million, nine hundred sixty-two thousand, six hundred sixty-one".