1902378484 has 12 divisors (see below), whose sum is σ = 3473908704. Its totient is φ = 909833144.

The previous prime is 1902378481. The next prime is 1902378497. The reversal of 1902378484 is 4848732091.

It is a super-2 number, since 2×1902378484² = 7238087792772276512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902378481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10338922 + ... + 10339105.

It is an arithmetic number, because the mean of its divisors is an integer number (289492392).

Almost surely, 2^1902378484 is an apocalyptic number.

It is an amenable number.

1902378484 is a deficient number, since it is larger than the sum of its proper divisors (1571530220).

1902378484 is a wasteful number, since it uses less digits than its factorization.

1902378484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20678054 (or 20678052 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 1902378484 is about 43616.2639848944. The cubic root of 1902378484 is about 1239.0789388019.

The spelling of 1902378484 in words is "one billion, nine hundred two million, three hundred seventy-eight thousand, four hundred eighty-four".