1921465490 has 16 divisors (see below), whose sum is σ = 3952729152. Its totient is φ = 658788144.

The previous prime is 1921465457. The next prime is 1921465493. The reversal of 1921465490 is 945641291.

It is not an unprimeable number, because it can be changed into a prime (1921465493) 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, 13724684 + ... + 13724823.

It is an arithmetic number, because the mean of its divisors is an integer number (247045572).

Almost surely, 2^1921465490 is an apocalyptic number.

1921465490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1921465490 is an abundant number, since it is smaller than the sum of its proper divisors (2031263662).

1921465490 is a wasteful number, since it uses less digits than its factorization.

1921465490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27449521.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1921465490 is about 43834.5239508769. The cubic root of 1921465490 is about 1243.2091454441.

The spelling of 1921465490 in words is "one billion, nine hundred twenty-one million, four hundred sixty-five thousand, four hundred ninety".