25464780 has 120 divisors (see below), whose sum is σ = 87207120. Its totient is φ = 6168960.

The previous prime is 25464767. The next prime is 25464787. The reversal of 25464780 is 8746452.

25464780 is a `hidden beast` number, since 2 + 5 + 4 + 647 + 8 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (25464787) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17106 + ... + 18534.

It is an arithmetic number, because the mean of its divisors is an integer number (726726).

Almost surely, 2^25464780 is an apocalyptic number.

25464780 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 25464780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43603560).

25464780 is an abundant number, since it is smaller than the sum of its proper divisors (61742340).

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

25464780 is a wasteful number, since it uses less digits than its factorization.

25464780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 25464780 is about 5046.2639645583. The cubic root of 25464780 is about 294.2026923790.

Adding to 25464780 its sum of digits (36), we get a triangular number (25464816 = T₇₁₃₆).

It can be divided in two parts, 25464 and 780, that added together give a square (26244 = 162²).

The spelling of 25464780 in words is "twenty-five million, four hundred sixty-four thousand, seven hundred eighty".