654499440 has 400 divisors, whose sum is σ = 2661829632. Its totient is φ = 145939968.

The previous prime is 654499429. The next prime is 654499451. The reversal of 654499440 is 44994456.

It is an interprime number because it is at equal distance from previous prime (654499429) and next prime (654499451).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2131767 + ... + 2132073.

Almost surely, 2^654499440 is an apocalyptic number.

654499440 is a gapful number since it is divisible by the number (60) 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 654499440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330914816).

654499440 is an abundant number, since it is smaller than the sum of its proper divisors (2007330192).

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

654499440 is a wasteful number, since it uses less digits than its factorization.

654499440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 654499440 is about 25583.1866662463. The cubic root of 654499440 is about 868.2332755899.

The spelling of 654499440 in words is "six hundred fifty-four million, four hundred ninety-nine thousand, four hundred forty".