400021888276 has 72 divisors (see below), whose sum is σ = 737690462208. Its totient is φ = 189780360000.

The previous prime is 400021888271. The next prime is 400021888289. The reversal of 400021888276 is 672888120004.

It is a happy number.

It is a super-2 number, since 2×400021888276² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400021888271) 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, 170148501 + ... + 170150851.

It is an arithmetic number, because the mean of its divisors is an integer number (10245700864).

Almost surely, 2^400021888276 is an apocalyptic number.

400021888276 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

400021888276 is a deficient number, since it is larger than the sum of its proper divisors (337668573932).

400021888276 is a wasteful number, since it uses less digits than its factorization.

400021888276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 400021888276 in words is "four hundred billion, twenty-one million, eight hundred eighty-eight thousand, two hundred seventy-six".