401787126 has 48 divisors (see below), whose sum is σ = 960392160. Its totient is φ = 120608640.

The previous prime is 401787121. The next prime is 401787143. The reversal of 401787126 is 621787104.

It is a super-2 number, since 2×401787126² = 322865789238679752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401787121) 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, 11346 + ... + 30533.

It is an arithmetic number, because the mean of its divisors is an integer number (20008170).

Almost surely, 2^401787126 is an apocalyptic number.

401787126 is an abundant number, since it is smaller than the sum of its proper divisors (558605034).

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

401787126 is a wasteful number, since it uses less digits than its factorization.

401787126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41941 (or 41938 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 401787126 is about 20044.6283577421. The cubic root of 401787126 is about 737.9019743334.

The spelling of 401787126 in words is "four hundred one million, seven hundred eighty-seven thousand, one hundred twenty-six".