34721388 has 72 divisors (see below), whose sum is σ = 95295200. Its totient is φ = 10659168.

The previous prime is 34721377. The next prime is 34721389. The reversal of 34721388 is 88312743.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (34721389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78873 + ... + 79311.

Almost surely, 2^34721388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 34721388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47647600).

34721388 is an abundant number, since it is smaller than the sum of its proper divisors (60573812).

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

34721388 is a wasteful number, since it uses less digits than its factorization.

34721388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 457 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 34721388 is about 5892.4857233599. The cubic root of 34721388 is about 326.2363573808.

The spelling of 34721388 in words is "thirty-four million, seven hundred twenty-one thousand, three hundred eighty-eight".