1920424402 has 12 divisors (see below), whose sum is σ = 3119269770. Its totient is φ = 886349568.

The previous prime is 1920424393. The next prime is 1920424409. The reversal of 1920424402 is 2044240291.

It can be written as a sum of positive squares in 3 ways, for example, as 864889281 + 1055535121 = 29409^2 + 32489^2 .

It is not an unprimeable number, because it can be changed into a prime (1920424409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2840527 + ... + 2841202.

Almost surely, 2^1920424402 is an apocalyptic number.

1920424402 is a deficient number, since it is larger than the sum of its proper divisors (1198845368).

1920424402 is a wasteful number, since it uses less digits than its factorization.

1920424402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681757 (or 5681744 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1920424402 is about 43822.6471359273. The cubic root of 1920424402 is about 1242.9845731133.

Adding to 1920424402 its reverse (2044240291), we get a palindrome (3964664693).

The spelling of 1920424402 in words is "one billion, nine hundred twenty million, four hundred twenty-four thousand, four hundred two".