6999229440 has 440 divisors, whose sum is σ = 28676210112. Its totient is φ = 1599160320.

The previous prime is 6999229427. The next prime is 6999229441. The reversal of 6999229440 is 449229996.

6999229440 is a `hidden beast` number, since 6 + 99 + 92 + 29 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6999229441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2901835 + ... + 2904245.

Almost surely, 2^6999229440 is an apocalyptic number.

6999229440 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 6999229440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14338105056).

6999229440 is an abundant number, since it is smaller than the sum of its proper divisors (21676980672).

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

6999229440 is a wasteful number, since it uses less digits than its factorization.

6999229440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The square root of 6999229440 is about 83661.3975498856. The cubic root of 6999229440 is about 1912.8609883751.

The spelling of 6999229440 in words is "six billion, nine hundred ninety-nine million, two hundred twenty-nine thousand, four hundred forty".