1904086490 has 16 divisors (see below), whose sum is σ = 3427884360. Its totient is φ = 761517120.

The previous prime is 1904086451. The next prime is 1904086493. The reversal of 1904086490 is 946804091.

It can be written as a sum of positive squares in 4 ways, for example, as 841522081 + 1062564409 = 29009^2 + 32597^2 .

It is a super-2 number, since 2×1904086490² = 7251090722801040200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1904086493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86756 + ... + 106464.

Almost surely, 2^1904086490 is an apocalyptic number.

1904086490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1904086490 is a deficient number, since it is larger than the sum of its proper divisors (1523797870).

1904086490 is a wasteful number, since it uses less digits than its factorization.

1904086490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29377.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1904086490 is about 43635.8395129508. The cubic root of 1904086490 is about 1239.4496538870.

The spelling of 1904086490 in words is "one billion, nine hundred four million, eighty-six thousand, four hundred ninety".