613909890 has 48 divisors (see below), whose sum is σ = 1741274496. Its totient is φ = 148826400.

The previous prime is 613909889. The next prime is 613909913. The reversal of 613909890 is 98909316.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309066 + ... + 311045.

It is an arithmetic number, because the mean of its divisors is an integer number (36276552).

Almost surely, 2^613909890 is an apocalyptic number.

613909890 is an abundant number, since it is smaller than the sum of its proper divisors (1127364606).

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

613909890 is a wasteful number, since it uses less digits than its factorization.

613909890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620135 (or 620132 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 613909890 is about 24777.2050481890. The cubic root of 613909890 is about 849.9007450425.

The spelling of 613909890 in words is "six hundred thirteen million, nine hundred nine thousand, eight hundred ninety".