7481990 has 8 divisors (see below), whose sum is σ = 13467600. Its totient is φ = 2992792.

The previous prime is 7481987. The next prime is 7481993. The reversal of 7481990 is 991847.

It is an interprime number because it is at equal distance from previous prime (7481987) and next prime (7481993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7481993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374090 + ... + 374109.

It is an arithmetic number, because the mean of its divisors is an integer number (1683450).

Almost surely, 2^7481990 is an apocalyptic number.

7481990 is a deficient number, since it is larger than the sum of its proper divisors (5985610).

7481990 is a wasteful number, since it uses less digits than its factorization.

7481990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748206.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 7481990 is about 2735.3226500726. The cubic root of 7481990 is about 195.5865747732.

The spelling of 7481990 in words is "seven million, four hundred eighty-one thousand, nine hundred ninety".