1258817490 has 64 divisors (see below), whose sum is σ = 3836401920. Its totient is φ = 287729280.

The previous prime is 1258817489. The next prime is 1258817519. The reversal of 1258817490 is 947188521.

1258817490 is a `hidden beast` number, since 12 + 588 + 17 + 49 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331131 + ... + 334910.

It is an arithmetic number, because the mean of its divisors is an integer number (59943780).

Almost surely, 2^1258817490 is an apocalyptic number.

1258817490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1258817490 is an abundant number, since it is smaller than the sum of its proper divisors (2577584430).

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

1258817490 is a wasteful number, since it uses less digits than its factorization.

1258817490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666064 (or 666058 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1258817490 is about 35479.8180660499. The cubic root of 1258817490 is about 1079.7443067526.

The spelling of 1258817490 in words is "one billion, two hundred fifty-eight million, eight hundred seventeen thousand, four hundred ninety".