400969487 has 8 divisors (see below), whose sum is σ = 410054400. Its totient is φ = 391960984.

The previous prime is 400969441. The next prime is 400969507. The reversal of 400969487 is 784969004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400969487 - 2⁶ = 400969423 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 (400969187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8423 + ... + 29544.

It is an arithmetic number, because the mean of its divisors is an integer number (51256800).

Almost surely, 2^400969487 is an apocalyptic number.

400969487 is a deficient number, since it is larger than the sum of its proper divisors (9084913).

400969487 is a wasteful number, since it uses less digits than its factorization.

400969487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38205.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 400969487 is about 20024.2225067542. Note that the first 3 decimals coincide. The cubic root of 400969487 is about 737.4010895600.

The spelling of 400969487 in words is "four hundred million, nine hundred sixty-nine thousand, four hundred eighty-seven".