1607253640 has 16 divisors (see below), whose sum is σ = 3616320780. Its totient is φ = 642901440.

The previous prime is 1607253623. The next prime is 1607253647. The reversal of 1607253640 is 463527061.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1373591844 + 233661796 = 37062^2 + 15286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1607253596 and 1607253605.

It is not an unprimeable number, because it can be changed into a prime (1607253647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20090631 + ... + 20090710.

Almost surely, 2^1607253640 is an apocalyptic number.

1607253640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1607253640 is an abundant number, since it is smaller than the sum of its proper divisors (2009067140).

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

1607253640 is a wasteful number, since it uses less digits than its factorization.

1607253640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40181352 (or 40181348 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 1607253640 is about 40090.5679680396. The cubic root of 1607253640 is about 1171.3719120212.

The spelling of 1607253640 in words is "one billion, six hundred seven million, two hundred fifty-three thousand, six hundred forty".