129498890 has 32 divisors (see below), whose sum is σ = 241709184. Its totient is φ = 49913280.

The previous prime is 129498883. The next prime is 129498917. The reversal of 129498890 is 98894921.

It is a happy number.

It is a super-2 number, since 2×129498890² = 33539925022464200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37955 + ... + 41225.

It is an arithmetic number, because the mean of its divisors is an integer number (7553412).

Almost surely, 2^129498890 is an apocalyptic number.

129498890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129498890 is a deficient number, since it is larger than the sum of its proper divisors (112210294).

129498890 is a wasteful number, since it uses less digits than its factorization.

129498890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422.

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 129498890 is about 11379.7579060365. The cubic root of 129498890 is about 505.9279608108.

The spelling of 129498890 in words is "one hundred twenty-nine million, four hundred ninety-eight thousand, eight hundred ninety".