1900454428 has 12 divisors (see below), whose sum is σ = 3382165080. Its totient is φ = 934121552.

The previous prime is 1900454389. The next prime is 1900454431. The reversal of 1900454428 is 8244540091.

It is a super-2 number, since 2×1900454428² = 7223454065809614368, which contains 22 as substring.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 190 and 454428 contains 1900454428 itself.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4026151 + ... + 4026622.

It is an arithmetic number, because the mean of its divisors is an integer number (281847090).

Almost surely, 2^1900454428 is an apocalyptic number.

It is an amenable number.

1900454428 is a deficient number, since it is larger than the sum of its proper divisors (1481710652).

1900454428 is a wasteful number, since it uses less digits than its factorization.

1900454428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8052836 (or 8052834 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1900454428 is about 43594.2017704190. The cubic root of 1900454428 is about 1238.6610651629.

The spelling of 1900454428 in words is "one billion, nine hundred million, four hundred fifty-four thousand, four hundred twenty-eight".