400036428 has 96 divisors (see below), whose sum is σ = 1145329920. Its totient is φ = 119733120.

The previous prime is 400036409. The next prime is 400036451. The reversal of 400036428 is 824630004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96576 + ... + 100632.

It is an arithmetic number, because the mean of its divisors is an integer number (11930520).

Almost surely, 2^400036428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400036428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (572664960).

400036428 is an abundant number, since it is smaller than the sum of its proper divisors (745293492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400036428 is a wasteful number, since it uses less digits than its factorization.

400036428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 400036428 is about 20000.9106792666. The cubic root of 400036428 is about 736.8286660324.

The spelling of 400036428 in words is "four hundred million, thirty-six thousand, four hundred twenty-eight".