25770540 has 24 divisors (see below), whose sum is σ = 72157680. Its totient is φ = 6872128.

The previous prime is 25770539. The next prime is 25770541. The reversal of 25770540 is 4507752.

It is an interprime number because it is at equal distance from previous prime (25770539) and next prime (25770541).

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 = 25770498 and 25770507.

It is not an unprimeable number, because it can be changed into a prime (25770541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214695 + ... + 214814.

It is an arithmetic number, because the mean of its divisors is an integer number (3006570).

Almost surely, 2^25770540 is an apocalyptic number.

25770540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25770540 is an abundant number, since it is smaller than the sum of its proper divisors (46387140).

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

25770540 is a wasteful number, since it uses less digits than its factorization.

25770540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429521 (or 429519 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 25770540 is about 5076.4692454500. The cubic root of 25770540 is about 295.3755248312.

The spelling of 25770540 in words is "twenty-five million, seven hundred seventy thousand, five hundred forty".