401649822 has 48 divisors (see below), whose sum is σ = 995735520. Its totient is φ = 114621696.

The previous prime is 401649821. The next prime is 401649823. The reversal of 401649822 is 228946104.

401649822 is a `hidden beast` number, since 4 + 0 + 1 + 649 + 8 + 2 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (401649821) and next prime (401649823).

It is a super-2 number, since 2×401649822² = 322645159025263368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401649821) 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, 161178 + ... + 163650.

It is an arithmetic number, because the mean of its divisors is an integer number (20744490).

Almost surely, 2^401649822 is an apocalyptic number.

401649822 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

401649822 is an abundant number, since it is smaller than the sum of its proper divisors (594085698).

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

401649822 is a wasteful number, since it uses less digits than its factorization.

401649822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 401649822 is about 20041.2031075981. The cubic root of 401649822 is about 737.8179095560.

The spelling of 401649822 in words is "four hundred one million, six hundred forty-nine thousand, eight hundred twenty-two".