128738652 has 24 divisors (see below), whose sum is σ = 343303296. Its totient is φ = 36782448.

The previous prime is 128738611. The next prime is 128738657. The reversal of 128738652 is 256837821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128738657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766218 + ... + 766385.

It is an arithmetic number, because the mean of its divisors is an integer number (14304304).

Almost surely, 2^128738652 is an apocalyptic number.

128738652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128738652 is an abundant number, since it is smaller than the sum of its proper divisors (214564644).

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

128738652 is a wasteful number, since it uses less digits than its factorization.

128738652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532617 (or 1532615 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 128738652 is about 11346.3056542647. The cubic root of 128738652 is about 504.9359811668.

The spelling of 128738652 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, six hundred fifty-two".