1802312640 has 224 divisors, whose sum is σ = 6693408000. Its totient is φ = 455279616.

The previous prime is 1802312639. The next prime is 1802312653. The reversal of 1802312640 is 462132081.

1802312640 is a `hidden beast` number, since 1 + 8 + 0 + 2 + 3 + 12 + 640 = 666.

1802312640 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158671 + ... + 169649.

Almost surely, 2^1802312640 is an apocalyptic number.

1802312640 is a gapful number since it is divisible by the number (10) 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 1802312640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3346704000).

1802312640 is an abundant number, since it is smaller than the sum of its proper divisors (4891095360).

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

1802312640 is a wasteful number, since it uses less digits than its factorization.

1802312640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11024 (or 11008 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1802312640 is about 42453.6528463688. The cubic root of 1802312640 is about 1216.9611370385.

The spelling of 1802312640 in words is "one billion, eight hundred two million, three hundred twelve thousand, six hundred forty".