34978725 has 18 divisors (see below), whose sum is σ = 62651186. Its totient is φ = 18655200.

The previous prime is 34978711. The next prime is 34978739. The reversal of 34978725 is 52787943.

It is an interprime number because it is at equal distance from previous prime (34978711) and next prime (34978739).

It can be written as a sum of positive squares in 3 ways, for example, as 11329956 + 23648769 = 3366^2 + 4863^2 .

It is not a de Polignac number, because 34978725 - 2⁵ = 34978693 is a prime.

It is a super-2 number, since 2×34978725² = 2447022405251250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 77506 + ... + 77955.

Almost surely, 2^34978725 is an apocalyptic number.

It is an amenable number.

34978725 is a deficient number, since it is larger than the sum of its proper divisors (27672461).

34978725 is a wasteful number, since it uses less digits than its factorization.

34978725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155477 (or 155469 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 34978725 is about 5914.2814440978. The cubic root of 34978725 is about 327.0403395511.

The spelling of 34978725 in words is "thirty-four million, nine hundred seventy-eight thousand, seven hundred twenty-five".