401615487 has 72 divisors (see below), whose sum is σ = 729915264. Its totient is φ = 208308672.

The previous prime is 401615453. The next prime is 401615527. The reversal of 401615487 is 784516104.

It is a happy number.

It is not a de Polignac number, because 401615487 - 2⁷ = 401615359 is a prime.

It is a super-2 number, since 2×401615487² = 322589998796494338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401615387) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 713068 + ... + 713630.

It is an arithmetic number, because the mean of its divisors is an integer number (10137712).

Almost surely, 2^401615487 is an apocalyptic number.

401615487 is a deficient number, since it is larger than the sum of its proper divisors (328299777).

401615487 is a wasteful number, since it uses less digits than its factorization.

401615487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 401615487 is about 20040.3464790407. The cubic root of 401615487 is about 737.7968848570.

It can be divided in two parts, 4016 and 15487, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 401615487 in words is "four hundred one million, six hundred fifteen thousand, four hundred eighty-seven".