401780079 has 6 divisors (see below), whose sum is σ = 580349016. Its totient is φ = 267853380.

The previous prime is 401780069. The next prime is 401780083. The reversal of 401780079 is 970087104.

It is not a de Polignac number, because 401780079 - 2⁴ = 401780063 is a prime.

It is a super-2 number, since 2×401780079² = 322854463762492482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401780069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22321107 + ... + 22321124.

It is an arithmetic number, because the mean of its divisors is an integer number (96724836).

Almost surely, 2^401780079 is an apocalyptic number.

401780079 is a deficient number, since it is larger than the sum of its proper divisors (178568937).

401780079 is a wasteful number, since it uses less digits than its factorization.

401780079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44642237 (or 44642234 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 401780079 is about 20044.4525742161. The cubic root of 401780079 is about 737.8976602532.

The spelling of 401780079 in words is "four hundred one million, seven hundred eighty thousand, seventy-nine".