2425640140 has 144 divisors (see below), whose sum is σ = 6544468224. Its totient is φ = 746659200.

The previous prime is 2425640089. The next prime is 2425640143. The reversal of 2425640140 is 410465242.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 2425640099 and 2425640108.

It is not an unprimeable number, because it can be changed into a prime (2425640143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 893385 + ... + 896095.

It is an arithmetic number, because the mean of its divisors is an integer number (45447696).

Almost surely, 2^2425640140 is an apocalyptic number.

2425640140 is a gapful number since it is divisible by the number (20) 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 2425640140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3272234112).

2425640140 is an abundant number, since it is smaller than the sum of its proper divisors (4118828084).

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

2425640140 is a wasteful number, since it uses less digits than its factorization.

2425640140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 2425640140 is about 49250.7882170428. The cubic root of 2425640140 is about 1343.6168974634.

The spelling of 2425640140 in words is "two billion, four hundred twenty-five million, six hundred forty thousand, one hundred forty".