1953399040 has 36 divisors (see below), whose sum is σ = 4679004204. Its totient is φ = 781359104.

The previous prime is 1953399031. The next prime is 1953399061. The reversal of 1953399040 is 409933591.

It can be written as a sum of positive squares in 2 ways, for example, as 519110656 + 1434288384 = 22784^2 + 37872^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 761767 + ... + 764326.

It is an arithmetic number, because the mean of its divisors is an integer number (129972339).

Almost surely, 2^1953399040 is an apocalyptic number.

1953399040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1953399040 is an abundant number, since it is smaller than the sum of its proper divisors (2725605164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1953399040 is an equidigital number, since it uses as much as digits as its factorization.

1953399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526114 (or 1526100 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1953399040 is about 44197.2741240905. The cubic root of 1953399040 is about 1250.0584591326.

The spelling of 1953399040 in words is "one billion, nine hundred fifty-three million, three hundred ninety-nine thousand, forty".