7840490 has 24 divisors (see below), whose sum is σ = 16418052. Its totient is φ = 2688000.

The previous prime is 7840439. The next prime is 7840499. The reversal of 7840490 is 940487.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7722841 + 117649 = 2779^2 + 343^2 .

It is a super-2 number, since 2×7840490² = 122946566880200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7840499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7511 + ... + 8490.

Almost surely, 2^7840490 is an apocalyptic number.

7840490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7840490 is an abundant number, since it is smaller than the sum of its proper divisors (8577562).

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

7840490 is a wasteful number, since it uses less digits than its factorization.

7840490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022 (or 16015 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 7840490 is about 2800.0874986329. The cubic root of 7840490 is about 198.6618162913.

It can be divided in two parts, 7840 and 490, that multiplied together give a square (3841600 = 1960²).

The spelling of 7840490 in words is "seven million, eight hundred forty thousand, four hundred ninety".