4390291840 has 64 divisors (see below), whose sum is σ = 11449699920. Its totient is φ = 1596467200.

The previous prime is 4390291799. The next prime is 4390291853. The reversal of 4390291840 is 481920934.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 4390291793 and 4390291802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304771 + ... + 318850.

Almost surely, 2^4390291840 is an apocalyptic number.

4390291840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4390291840 is an abundant number, since it is smaller than the sum of its proper divisors (7059408080).

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

4390291840 is a wasteful number, since it uses less digits than its factorization.

4390291840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623651 (or 623639 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 4390291840 is about 66259.2773881515. The cubic root of 4390291840 is about 1637.4364867854.

The spelling of 4390291840 in words is "four billion, three hundred ninety million, two hundred ninety-one thousand, eight hundred forty".