307172070 has 48 divisors (see below), whose sum is σ = 803771280. Its totient is φ = 81387072.

The previous prime is 307172051. The next prime is 307172071. The reversal of 307172070 is 70271703.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307172071) 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, 3261 + ... + 24999.

It is an arithmetic number, because the mean of its divisors is an integer number (16745235).

Almost surely, 2^307172070 is an apocalyptic number.

307172070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 307172070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401885640).

307172070 is an abundant number, since it is smaller than the sum of its proper divisors (496599210).

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

307172070 is a wasteful number, since it uses less digits than its factorization.

307172070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21909 (or 21906 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 307172070 is about 17526.3250568966. The cubic root of 307172070 is about 674.7256827724.

The spelling of 307172070 in words is "three hundred seven million, one hundred seventy-two thousand, seventy".