491592378 has 16 divisors (see below), whose sum is σ = 1007165376. Its totient is φ = 159867360.

The previous prime is 491592251. The next prime is 491592401. The reversal of 491592378 is 873295194.

It is a super-2 number, since 2×491592378² = 483326132215389768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998926 + ... + 999417.

It is an arithmetic number, because the mean of its divisors is an integer number (62947836).

Almost surely, 2^491592378 is an apocalyptic number.

491592378 is an abundant number, since it is smaller than the sum of its proper divisors (515572998).

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

491592378 is a wasteful number, since it uses less digits than its factorization.

491592378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998389.

The product of its digits is 544320, while the sum is 48.

The square root of 491592378 is about 22171.8825993644. The cubic root of 491592378 is about 789.2265987546.

The spelling of 491592378 in words is "four hundred ninety-one million, five hundred ninety-two thousand, three hundred seventy-eight".