401780620 has 12 divisors (see below), whose sum is σ = 843739344. Its totient is φ = 160712240.

The previous prime is 401780597. The next prime is 401780623. The reversal of 401780620 is 26087104.

It is a super-2 number, since 2×401780620² = 322855333215168800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401780623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10044496 + ... + 10044535.

It is an arithmetic number, because the mean of its divisors is an integer number (70311612).

Almost surely, 2^401780620 is an apocalyptic number.

It is an amenable number.

401780620 is an abundant number, since it is smaller than the sum of its proper divisors (441958724).

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

401780620 is a wasteful number, since it uses less digits than its factorization.

401780620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20089040 (or 20089038 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 401780620 is about 20044.4660692172. The cubic root of 401780620 is about 737.8979914481.

The spelling of 401780620 in words is "four hundred one million, seven hundred eighty thousand, six hundred twenty".