403251861240 has 672 divisors, whose sum is σ = 1461660156000. Its totient is φ = 100051365888.

The previous prime is 403251861217. The next prime is 403251861241. The reversal of 403251861240 is 42168152304.

It is a happy number.

403251861240 is a `hidden beast` number, since 4 + 0 + 3 + 25 + 18 + 612 + 4 + 0 = 666.

It is a super-2 number, since 2×403251861240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 403251861195 and 403251861204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403251861241) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 918568941 + ... + 918569379.

Almost surely, 2^403251861240 is an apocalyptic number.

403251861240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403251861240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730830078000).

403251861240 is an abundant number, since it is smaller than the sum of its proper divisors (1058408294760).

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

403251861240 is a wasteful number, since it uses less digits than its factorization.

403251861240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 403251861240 in words is "four hundred three billion, two hundred fifty-one million, eight hundred sixty-one thousand, two hundred forty".