1998472705 has 16 divisors (see below), whose sum is σ = 2425360320. Its totient is φ = 1580709312.

The previous prime is 1998472699. The next prime is 1998472711. The reversal of 1998472705 is 5072748991.

It is an interprime number because it is at equal distance from previous prime (1998472699) and next prime (1998472711).

It is a cyclic number.

It is not a de Polignac number, because 1998472705 - 2⁵ = 1998472673 is a prime.

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, 289231 + ... + 296059.

It is an arithmetic number, because the mean of its divisors is an integer number (151585020).

Almost surely, 2^1998472705 is an apocalyptic number.

It is an amenable number.

1998472705 is a deficient number, since it is larger than the sum of its proper divisors (426887615).

1998472705 is a wasteful number, since it uses less digits than its factorization.

1998472705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1998472705 is about 44704.2806115924. The cubic root of 1998472705 is about 1259.6002563700.

The spelling of 1998472705 in words is "one billion, nine hundred ninety-eight million, four hundred seventy-two thousand, seven hundred five".