1900993906 has 48 divisors (see below), whose sum is σ = 3475267200. Its totient is φ = 776569248.

The previous prime is 1900993901. The next prime is 1900993951. The reversal of 1900993906 is 6093990091.

It is a super-2 number, since 2×1900993906² = 7227555661298273672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900993901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220285 + ... + 228751.

It is an arithmetic number, because the mean of its divisors is an integer number (72401400).

Almost surely, 2^1900993906 is an apocalyptic number.

1900993906 is a deficient number, since it is larger than the sum of its proper divisors (1574273294).

1900993906 is a wasteful number, since it uses less digits than its factorization.

1900993906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591 (or 8584 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 1900993906 is about 43600.3888285414. The cubic root of 1900993906 is about 1238.7782594445.

The spelling of 1900993906 in words is "one billion, nine hundred million, nine hundred ninety-three thousand, nine hundred six".