129870398 has 16 divisors (see below), whose sum is σ = 223428480. Its totient is φ = 55460376.

The previous prime is 129870379. The next prime is 129870409. The reversal of 129870398 is 893078921.

It is a super-3 number, since 3×129870398³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12428 + ... + 20351.

It is an arithmetic number, because the mean of its divisors is an integer number (13964280).

Almost surely, 2^129870398 is an apocalyptic number.

129870398 is a deficient number, since it is larger than the sum of its proper divisors (93558082).

129870398 is a wasteful number, since it uses less digits than its factorization.

129870398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33071.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 129870398 is about 11396.0694101080. The cubic root of 129870398 is about 506.4113030070.

The spelling of 129870398 in words is "one hundred twenty-nine million, eight hundred seventy thousand, three hundred ninety-eight".