401780808 has 96 divisors (see below), whose sum is σ = 1278426240. Its totient is φ = 112383360.

The previous prime is 401780789. The next prime is 401780809. The reversal of 401780808 is 808087104.

It is a super-2 number, since 2×401780808² = 322855635354265728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (401780809) 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, 9216 + ... + 29807.

It is an arithmetic number, because the mean of its divisors is an integer number (13316940).

Almost surely, 2^401780808 is an apocalyptic number.

It is an amenable number.

401780808 is an abundant number, since it is smaller than the sum of its proper divisors (876645432).

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

401780808 is a wasteful number, since it uses less digits than its factorization.

401780808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39059 (or 39052 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 401780808 is about 20044.4707587903. The cubic root of 401780808 is about 737.8981065397.

The spelling of 401780808 in words is "four hundred one million, seven hundred eighty thousand, eight hundred eight".