495257490 has 160 divisors (see below), whose sum is σ = 1639249920. Its totient is φ = 104478336.

The previous prime is 495257479. The next prime is 495257513. The reversal of 495257490 is 94752594.

495257490 is a `hidden beast` number, since 495 + 2 + 5 + 74 + 90 = 666.

It is a super-2 number, since 2×495257490² = 490559962802200200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 70351 + ... + 77069.

It is an arithmetic number, because the mean of its divisors is an integer number (10245312).

Almost surely, 2^495257490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 495257490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819624960).

495257490 is an abundant number, since it is smaller than the sum of its proper divisors (1143992430).

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

495257490 is a wasteful number, since it uses less digits than its factorization.

495257490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758 (or 6749 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 495257490 is about 22254.3813663737. The cubic root of 495257490 is about 791.1831281506.

The spelling of 495257490 in words is "four hundred ninety-five million, two hundred fifty-seven thousand, four hundred ninety".