7257040 has 40 divisors (see below), whose sum is σ = 19284480. Its totient is φ = 2487936.

The previous prime is 7257037. The next prime is 7257043. The reversal of 7257040 is 407527.

It is an interprime number because it is at equal distance from previous prime (7257037) and next prime (7257043).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 7256996 and 7257014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7257043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5920 + ... + 7039.

It is an arithmetic number, because the mean of its divisors is an integer number (482112).

Almost surely, 2^7257040 is an apocalyptic number.

7257040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7257040 is an abundant number, since it is smaller than the sum of its proper divisors (12027440).

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

7257040 is a wasteful number, since it uses less digits than its factorization.

7257040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12979 (or 12973 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 7257040 is about 2693.8893815448. The cubic root of 7257040 is about 193.6064576768.

The spelling of 7257040 in words is "seven million, two hundred fifty-seven thousand, forty".