7902440 has 96 divisors (see below), whose sum is σ = 22135680. Its totient is φ = 2486016.

The previous prime is 7902437. The next prime is 7902443. The reversal of 7902440 is 442097.

7902440 = 431² + 432² + ... + 469².

It is an interprime number because it is at equal distance from previous prime (7902437) and next prime (7902443).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (7902443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47237 + ... + 47403.

It is an arithmetic number, because the mean of its divisors is an integer number (230580).

Almost surely, 2^7902440 is an apocalyptic number.

7902440 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 7902440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11067840).

7902440 is an abundant number, since it is smaller than the sum of its proper divisors (14233240).

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

7902440 is a wasteful number, since it uses less digits than its factorization.

7902440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 7902440 is about 2811.1278875213. The cubic root of 7902440 is about 199.1836725810.

The spelling of 7902440 in words is "seven million, nine hundred two thousand, four hundred forty".