129572890 has 32 divisors (see below), whose sum is σ = 244664064. Its totient is φ = 49348800.

The previous prime is 129572887. The next prime is 129572903. The reversal of 129572890 is 98275921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13665 + ... + 21115.

It is an arithmetic number, because the mean of its divisors is an integer number (7645752).

Almost surely, 2^129572890 is an apocalyptic number.

129572890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129572890 is a deficient number, since it is larger than the sum of its proper divisors (115091174).

129572890 is a wasteful number, since it uses less digits than its factorization.

129572890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7542.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 129572890 is about 11383.0088289520. The cubic root of 129572890 is about 506.0243105173.

The spelling of 129572890 in words is "one hundred twenty-nine million, five hundred seventy-two thousand, eight hundred ninety".