129573990 has 144 divisors (see below), whose sum is σ = 417257568. Its totient is φ = 27316224.

The previous prime is 129573989. The next prime is 129573991. The reversal of 129573990 is 99375921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129573989) and next prime (129573991).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129573991) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 105862 + ... + 107078.

It is an arithmetic number, because the mean of its divisors is an integer number (2897622).

Almost surely, 2^129573990 is an apocalyptic number.

129573990 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 129573990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208628784).

129573990 is an abundant number, since it is smaller than the sum of its proper divisors (287683578).

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

129573990 is a wasteful number, since it uses less digits than its factorization.

129573990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 129573990 is about 11383.0571464787. The cubic root of 129573990 is about 506.0257424660.

The spelling of 129573990 in words is "one hundred twenty-nine million, five hundred seventy-three thousand, nine hundred ninety".