298274640 has 40 divisors (see below), whose sum is σ = 924652128. Its totient is φ = 79539840.

The previous prime is 298274623. The next prime is 298274659. The reversal of 298274640 is 46472892.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 298274592 and 298274601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621166 + ... + 621645.

Almost surely, 2^298274640 is an apocalyptic number.

298274640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

298274640 is an abundant number, since it is smaller than the sum of its proper divisors (626377488).

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

298274640 is a wasteful number, since it uses less digits than its factorization.

298274640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242827 (or 1242821 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 298274640 is about 17270.6294037015. The cubic root of 298274640 is about 668.1471343340.

The spelling of 298274640 in words is "two hundred ninety-eight million, two hundred seventy-four thousand, six hundred forty".