401229720 has 64 divisors (see below), whose sum is σ = 1337436000. Its totient is φ = 106994304.

The previous prime is 401229679. The next prime is 401229727. The reversal of 401229720 is 27922104.

It is a super-2 number, since 2×401229720² = 321970576422556800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401229727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184675 + ... + 186834.

Almost surely, 2^401229720 is an apocalyptic number.

401229720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401229720 is an abundant number, since it is smaller than the sum of its proper divisors (936206280).

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

401229720 is a wasteful number, since it uses less digits than its factorization.

401229720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371529 (or 371519 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 401229720 is about 20030.7194079494. The cubic root of 401229720 is about 737.5605818279.

The spelling of 401229720 in words is "four hundred one million, two hundred twenty-nine thousand, seven hundred twenty".