401235720 has 32 divisors (see below), whose sum is σ = 1203707520. Its totient is φ = 106996160.

The previous prime is 401235719. The next prime is 401235721. The reversal of 401235720 is 27532104.

It is an interprime number because it is at equal distance from previous prime (401235719) and next prime (401235721).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (401235721) 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, 1671696 + ... + 1671935.

It is an arithmetic number, because the mean of its divisors is an integer number (37615860).

Almost surely, 2^401235720 is an apocalyptic number.

401235720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401235720 is an abundant number, since it is smaller than the sum of its proper divisors (802471800).

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

401235720 is a wasteful number, since it uses less digits than its factorization.

401235720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343645 (or 3343641 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 401235720 is about 20030.8691773472. The cubic root of 401235720 is about 737.5642583099.

Adding to 401235720 its reverse (27532104), we get a palindrome (428767824).

The spelling of 401235720 in words is "four hundred one million, two hundred thirty-five thousand, seven hundred twenty".