491927400 has 144 divisors (see below), whose sum is σ = 1677124800. Its totient is φ = 129191040.

The previous prime is 491927383. The next prime is 491927417. The reversal of 491927400 is 4729194.

It is an interprime number because it is at equal distance from previous prime (491927383) and next prime (491927417).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118561 + ... + 122639.

It is an arithmetic number, because the mean of its divisors is an integer number (11646700).

Almost surely, 2^491927400 is an apocalyptic number.

491927400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491927400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838562400).

491927400 is an abundant number, since it is smaller than the sum of its proper divisors (1185197400).

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

491927400 is a wasteful number, since it uses less digits than its factorization.

491927400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 491927400 is about 22179.4364220555. The cubic root of 491927400 is about 789.4058449778.

The spelling of 491927400 in words is "four hundred ninety-one million, nine hundred twenty-seven thousand, four hundred".