7140840 has 64 divisors (see below), whose sum is σ = 24485760. Its totient is φ = 1632000.

The previous prime is 7140823. The next prime is 7140841. The reversal of 7140840 is 480417.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 7140840.

It is not an unprimeable number, because it can be changed into a prime (7140841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3411 + ... + 5090.

It is an arithmetic number, because the mean of its divisors is an integer number (382590).

Almost surely, 2^7140840 is an apocalyptic number.

7140840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7140840 is an abundant number, since it is smaller than the sum of its proper divisors (17344920).

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

7140840 is a wasteful number, since it uses less digits than its factorization.

7140840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522 (or 8518 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 7140840 is about 2672.2350196044. The cubic root of 7140840 is about 192.5675481168.

The spelling of 7140840 in words is "seven million, one hundred forty thousand, eight hundred forty".