6461990 has 8 divisors (see below), whose sum is σ = 11631600. Its totient is φ = 2584792.

The previous prime is 6461953. The next prime is 6461999. The reversal of 6461990 is 991646.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6461990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461999) 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, 323090 + ... + 323109.

It is an arithmetic number, because the mean of its divisors is an integer number (1453950).

Almost surely, 2^6461990 is an apocalyptic number.

6461990 is a deficient number, since it is larger than the sum of its proper divisors (5169610).

6461990 is a wasteful number, since it uses less digits than its factorization.

6461990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646206.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 6461990 is about 2542.0444527978. The cubic root of 6461990 is about 186.2610701646.

The spelling of 6461990 in words is "six million, four hundred sixty-one thousand, nine hundred ninety".