25423740 has 144 divisors (see below), whose sum is σ = 83613600. Its totient is φ = 6412032.

The previous prime is 25423733. The next prime is 25423747. The reversal of 25423740 is 4732452.

It is an interprime number because it is at equal distance from previous prime (25423733) and next prime (25423747).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25423747) 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, 285616 + ... + 285704.

It is an arithmetic number, because the mean of its divisors is an integer number (580650).

Almost surely, 2^25423740 is an apocalyptic number.

25423740 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 25423740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41806800).

25423740 is an abundant number, since it is smaller than the sum of its proper divisors (58189860).

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

25423740 is a wasteful number, since it uses less digits than its factorization.

25423740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 25423740 is about 5042.1959501789. The cubic root of 25423740 is about 294.0445580112.

The spelling of 25423740 in words is "twenty-five million, four hundred twenty-three thousand, seven hundred forty".