347994720 has 72 divisors (see below), whose sum is σ = 1187536896. Its totient is φ = 92798208.

The previous prime is 347994707. The next prime is 347994727. The reversal of 347994720 is 27499743.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×347994720² = 242200650295756800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347994727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119392 + ... + 122271.

It is an arithmetic number, because the mean of its divisors is an integer number (16493568).

Almost surely, 2^347994720 is an apocalyptic number.

347994720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

347994720 is an abundant number, since it is smaller than the sum of its proper divisors (839542176).

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

347994720 is a wasteful number, since it uses less digits than its factorization.

347994720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241684 (or 241673 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 347994720 is about 18654.6165867862. The cubic root of 347994720 is about 703.3814082325.

The spelling of 347994720 in words is "three hundred forty-seven million, nine hundred ninety-four thousand, seven hundred twenty".