400884399 has 24 divisors (see below), whose sum is σ = 595026432. Its totient is φ = 259938000.

The previous prime is 400884397. The next prime is 400884403. The reversal of 400884399 is 993488004.

It is a happy number.

It is not a de Polignac number, because 400884399 - 2¹ = 400884397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400884397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95074 + ... + 99200.

It is an arithmetic number, because the mean of its divisors is an integer number (24792768).

Almost surely, 2^400884399 is an apocalyptic number.

400884399 is a deficient number, since it is larger than the sum of its proper divisors (194142033).

400884399 is a wasteful number, since it uses less digits than its factorization.

400884399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427 (or 4424 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 400884399 is about 20022.0977672171. The cubic root of 400884399 is about 737.3489256384.

The spelling of 400884399 in words is "four hundred million, eight hundred eighty-four thousand, three hundred ninety-nine".