247387470 has 32 divisors (see below), whose sum is σ = 647706240. Its totient is φ = 59972640.

The previous prime is 247387457. The next prime is 247387489. The reversal of 247387470 is 74783742.

It is a super-2 number, since 2×247387470² = 122401120626001800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374500 + ... + 375159.

It is an arithmetic number, because the mean of its divisors is an integer number (20240820).

Almost surely, 2^247387470 is an apocalyptic number.

247387470 is an abundant number, since it is smaller than the sum of its proper divisors (400318770).

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

247387470 is a wasteful number, since it uses less digits than its factorization.

247387470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749680.

The product of its (nonzero) digits is 263424, while the sum is 42.

The square root of 247387470 is about 15728.5558777658. Note that the first 3 decimals coincide. The cubic root of 247387470 is about 627.7584486932.

The spelling of 247387470 in words is "two hundred forty-seven million, three hundred eighty-seven thousand, four hundred seventy".