401424287 has 4 divisors (see below), whose sum is σ = 437917416. Its totient is φ = 364931160.

The previous prime is 401424263. The next prime is 401424319. The reversal of 401424287 is 782424104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401424287 - 2⁶ = 401424223 is a prime.

It is a super-2 number, since 2×401424287² = 322282916386916738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401424787) 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, 18246548 + ... + 18246569.

It is an arithmetic number, because the mean of its divisors is an integer number (109479354).

Almost surely, 2^401424287 is an apocalyptic number.

401424287 is a deficient number, since it is larger than the sum of its proper divisors (36493129).

401424287 is a wasteful number, since it uses less digits than its factorization.

401424287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36493128.

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 401424287 is about 20035.5755345336. The cubic root of 401424287 is about 737.6797834992.

The spelling of 401424287 in words is "four hundred one million, four hundred twenty-four thousand, two hundred eighty-seven".