491906415 has 96 divisors (see below), whose sum is σ = 1062609408. Its totient is φ = 187660800.

The previous prime is 491906413. The next prime is 491906477. The reversal of 491906415 is 514609194.

It is not a de Polignac number, because 491906415 - 2¹ = 491906413 is a prime.

It is a super-2 number, since 2×491906415² = 483943842236304450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491906411) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2717625 + ... + 2717805.

It is an arithmetic number, because the mean of its divisors is an integer number (11068848).

Almost surely, 2^491906415 is an apocalyptic number.

491906415 is an abundant number, since it is smaller than the sum of its proper divisors (570702993).

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

491906415 is a wasteful number, since it uses less digits than its factorization.

491906415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 491906415 is about 22178.9633436732. The cubic root of 491906415 is about 789.3946198002.

The spelling of 491906415 in words is "four hundred ninety-one million, nine hundred six thousand, four hundred fifteen".