1904945042 has 64 divisors (see below), whose sum is σ = 3874929408. Its totient is φ = 678240000.

The previous prime is 1904945041. The next prime is 1904945057. The reversal of 1904945042 is 2405494091.

It is a super-2 number, since 2×1904945042² = 7257631226080763528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1904944987 and 1904945005.

It is not an unprimeable number, because it can be changed into a prime (1904945041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197492 + ... + 206912.

It is an arithmetic number, because the mean of its divisors is an integer number (60545772).

Almost surely, 2^1904945042 is an apocalyptic number.

1904945042 is an abundant number, since it is smaller than the sum of its proper divisors (1969984366).

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

1904945042 is a wasteful number, since it uses less digits than its factorization.

1904945042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9555.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1904945042 is about 43645.6760974097. The cubic root of 1904945042 is about 1239.6359150479.

The spelling of 1904945042 in words is "one billion, nine hundred four million, nine hundred forty-five thousand, forty-two".