25430040 has 48 divisors (see below), whose sum is σ = 82648800. Its totient is φ = 6781248.

The previous prime is 25430039. The next prime is 25430081. The reversal of 25430040 is 4003452.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25429995 and 25430022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34960 + ... + 35679.

It is an arithmetic number, because the mean of its divisors is an integer number (1721850).

Almost surely, 2^25430040 is an apocalyptic number.

25430040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25430040 is an abundant number, since it is smaller than the sum of its proper divisors (57218760).

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

25430040 is a wasteful number, since it uses less digits than its factorization.

25430040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70656 (or 70649 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25430040 is about 5042.8206392851. The cubic root of 25430040 is about 294.0688440751.

Adding to 25430040 its reverse (4003452), we get a palindrome (29433492).

The spelling of 25430040 in words is "twenty-five million, four hundred thirty thousand, forty".