2500428 has 72 divisors (see below), whose sum is σ = 7151872. Its totient is φ = 665856.

The previous prime is 2500417. The next prime is 2500439. The reversal of 2500428 is 8240052.

It is an interprime number because it is at equal distance from previous prime (2500417) and next prime (2500439).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24225 + ... + 24327.

2^2500428 is an apocalyptic number.

2500428 is a gapful number since it is divisible by the number (28) 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 2500428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3575936).

2500428 is an abundant number, since it is smaller than the sum of its proper divisors (4651444).

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

2500428 is a wasteful number, since it uses less digits than its factorization.

2500428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2500428 is about 1581.2741697758. The cubic root of 2500428 is about 135.7286255261.

The spelling of 2500428 in words is "two million, five hundred thousand, four hundred twenty-eight".