29139948 has 18 divisors (see below), whose sum is σ = 73659404. Its totient is φ = 9713304.

The previous prime is 29139941. The next prime is 29139949. The reversal of 29139948 is 84993192.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (29139941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404686 + ... + 404757.

Almost surely, 2^29139948 is an apocalyptic number.

It is an amenable number.

29139948 is an abundant number, since it is smaller than the sum of its proper divisors (44519456).

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

29139948 is a wasteful number, since it uses less digits than its factorization.

29139948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809453 (or 809448 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 29139948 is about 5398.1430140373. The cubic root of 29139948 is about 307.7251018828.

It can be divided in two parts, 2 and 9139948, that added together give a triangular number (9139950 = T₄₂₇₅).

The spelling of 29139948 in words is "twenty-nine million, one hundred thirty-nine thousand, nine hundred forty-eight".