400834987 has 8 divisors (see below), whose sum is σ = 461705216. Its totient is φ = 340866792.

The previous prime is 400834981. The next prime is 400835041. The reversal of 400834987 is 789438004.

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

It is not a de Polignac number, because 400834987 - 2¹⁵ = 400802219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400834981) 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, 224553 + ... + 226330.

It is an arithmetic number, because the mean of its divisors is an integer number (57713152).

Almost surely, 2^400834987 is an apocalyptic number.

400834987 is a deficient number, since it is larger than the sum of its proper divisors (60870229).

400834987 is a wasteful number, since it uses less digits than its factorization.

400834987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451017.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 400834987 is about 20020.8637925540. The cubic root of 400834987 is about 737.3186298040.

The spelling of 400834987 in words is "four hundred million, eight hundred thirty-four thousand, nine hundred eighty-seven".