3251245440 has 64 divisors (see below), whose sum is σ = 10363350960. Its totient is φ = 866998272.

The previous prime is 3251245399. The next prime is 3251245453. The reversal of 3251245440 is 445421523.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×3251245440² = 21141193822241587200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3251245398 and 3251245407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844759 + ... + 848598.

Almost surely, 2^3251245440 is an apocalyptic number.

3251245440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3251245440 is an abundant number, since it is smaller than the sum of its proper divisors (7112105520).

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

3251245440 is a wasteful number, since it uses less digits than its factorization.

3251245440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693379 (or 1693367 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 3251245440 is about 57019.6934400738. The cubic root of 3251245440 is about 1481.4372208653.

Adding to 3251245440 its reverse (445421523), we get a palindrome (3696666963).

The spelling of 3251245440 in words is "three billion, two hundred fifty-one million, two hundred forty-five thousand, four hundred forty".