1953899450 has 24 divisors (see below), whose sum is σ = 3792266208. Its totient is φ = 747578480.

The previous prime is 1953899449. The next prime is 1953899477. The reversal of 1953899450 is 549983591.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1953899392 and 1953899401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 848372 + ... + 850671.

It is an arithmetic number, because the mean of its divisors is an integer number (158011092).

Almost surely, 2^1953899450 is an apocalyptic number.

1953899450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1953899450 is a deficient number, since it is larger than the sum of its proper divisors (1838366758).

1953899450 is a wasteful number, since it uses less digits than its factorization.

1953899450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699078 (or 1699073 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The square root of 1953899450 is about 44202.9348573146. The cubic root of 1953899450 is about 1250.1651941677.

The spelling of 1953899450 in words is "one billion, nine hundred fifty-three million, eight hundred ninety-nine thousand, four hundred fifty".