10431990 has 80 divisors (see below), whose sum is σ = 28697328. Its totient is φ = 2729376.

The previous prime is 10431973. The next prime is 10431991. The reversal of 10431990 is 9913401.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10431991) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 196804 + ... + 196856.

Almost surely, 2^10431990 is an apocalyptic number.

10431990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10431990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14348664).

10431990 is an abundant number, since it is smaller than the sum of its proper divisors (18265338).

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

10431990 is an frugal number, since it uses more digits than its factorization.

10431990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 10431990 is about 3229.8591300551. The cubic root of 10431990 is about 218.5021530333.

The spelling of 10431990 in words is "ten million, four hundred thirty-one thousand, nine hundred ninety".