63431490 has 32 divisors (see below), whose sum is σ = 154820160. Its totient is φ = 16627904.

The previous prime is 63431483. The next prime is 63431491. The reversal of 63431490 is 9413436.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (63431491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16149 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (4838130).

Almost surely, 2^63431490 is an apocalyptic number.

63431490 is an abundant number, since it is smaller than the sum of its proper divisors (91388670).

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

63431490 is a wasteful number, since it uses less digits than its factorization.

63431490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35906.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 63431490 is about 7964.3888654435. The cubic root of 63431490 is about 398.8120797729.

The spelling of 63431490 in words is "sixty-three million, four hundred thirty-one thousand, four hundred ninety".