491921070 has 32 divisors (see below), whose sum is σ = 1181619360. Its totient is φ = 131066880.

The previous prime is 491921041. The next prime is 491921081. The reversal of 491921070 is 70129194.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32310 + ... + 45030.

It is an arithmetic number, because the mean of its divisors is an integer number (36925605).

Almost surely, 2^491921070 is an apocalyptic number.

491921070 is an abundant number, since it is smaller than the sum of its proper divisors (689698290).

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

491921070 is a wasteful number, since it uses less digits than its factorization.

491921070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 491921070 is about 22179.2937218479. The cubic root of 491921070 is about 789.4024590036.

The spelling of 491921070 in words is "four hundred ninety-one million, nine hundred twenty-one thousand, seventy".