7442890 has 32 divisors (see below), whose sum is σ = 16490880. Its totient is φ = 2355264.

The previous prime is 7442887. The next prime is 7442893. The reversal of 7442890 is 982447.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7442887) and next prime (7442893).

It is a super-2 number, since 2×7442890² = 110793223104200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7442893) 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 15 ways as a sum of consecutive naturals, for example, 3180 + ... + 4999.

It is an arithmetic number, because the mean of its divisors is an integer number (515340).

Almost surely, 2^7442890 is an apocalyptic number.

7442890 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7442890 is an abundant number, since it is smaller than the sum of its proper divisors (9047990).

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

7442890 is a wasteful number, since it uses less digits than its factorization.

7442890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 7442890 is about 2728.1660506648. The cubic root of 7442890 is about 195.2452754033.

The spelling of 7442890 in words is "seven million, four hundred forty-two thousand, eight hundred ninety".