1653440490 has 96 divisors (see below), whose sum is σ = 4779081216. Its totient is φ = 393863040.

The previous prime is 1653440483. The next prime is 1653440501. The reversal of 1653440490 is 940443561.

1653440490 is a `hidden beast` number, since 165 + 3 + 4 + 4 + 0 + 490 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13477 + ... + 59063.

It is an arithmetic number, because the mean of its divisors is an integer number (49782096).

Almost surely, 2^1653440490 is an apocalyptic number.

1653440490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1653440490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389540608).

1653440490 is an abundant number, since it is smaller than the sum of its proper divisors (3125640726).

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

1653440490 is a wasteful number, since it uses less digits than its factorization.

1653440490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45644 (or 45641 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1653440490 is about 40662.5194743267. The cubic root of 1653440490 is about 1182.4864952636.

The spelling of 1653440490 in words is "one billion, six hundred fifty-three million, four hundred forty thousand, four hundred ninety".