7287227640 has 256 divisors, whose sum is σ = 30284928000. Its totient is φ = 1514211840.

The previous prime is 7287227627. The next prime is 7287227671. The reversal of 7287227640 is 467227827.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39346 + ... + 126974.

It is an arithmetic number, because the mean of its divisors is an integer number (118300500).

Almost surely, 2^7287227640 is an apocalyptic number.

7287227640 is a gapful number since it is divisible by the number (70) 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 7287227640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15142464000).

7287227640 is an abundant number, since it is smaller than the sum of its proper divisors (22997700360).

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

7287227640 is a wasteful number, since it uses less digits than its factorization.

7287227640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87667 (or 87657 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 7287227640 is about 85365.2601472051. The cubic root of 7287227640 is about 1938.7453928036.

The spelling of 7287227640 in words is "seven billion, two hundred eighty-seven million, two hundred twenty-seven thousand, six hundred forty".