8400926640 has 160 divisors (see below), whose sum is σ = 27754223616. Its totient is φ = 2097187840.

The previous prime is 8400926621. The next prime is 8400926647. The reversal of 8400926640 is 466290048.

8400926640 is a modest number, since divided by 926640 gives 8400 as remainder.

It is not an unprimeable number, because it can be changed into a prime (8400926647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243250 + ... + 275630.

Almost surely, 2^8400926640 is an apocalyptic number.

8400926640 is a gapful number since it is divisible by the number (80) 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 8400926640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13877111808).

8400926640 is an abundant number, since it is smaller than the sum of its proper divisors (19353296976).

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

8400926640 is a wasteful number, since it uses less digits than its factorization.

8400926640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32467 (or 32461 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 8400926640 is about 91656.5689953535. The cubic root of 8400926640 is about 2032.8674595733.

The spelling of 8400926640 in words is "eight billion, four hundred million, nine hundred twenty-six thousand, six hundred forty".