67909890 has 32 divisors (see below), whose sum is σ = 163604736. Its totient is φ = 18040320.

The previous prime is 67909873. The next prime is 67909913. The reversal of 67909890 is 9890976.

It is a happy number.

It is a super-2 number, since 2×67909890² = 9223506319624200, which contains 22 as substring.

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, 3954 + ... + 12306.

It is an arithmetic number, because the mean of its divisors is an integer number (5112648).

Almost surely, 2^67909890 is an apocalyptic number.

67909890 is an abundant number, since it is smaller than the sum of its proper divisors (95694846).

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

67909890 is a wasteful number, since it uses less digits than its factorization.

67909890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 67909890 is about 8240.7457186835. The cubic root of 67909890 is about 407.9851373863.

The spelling of 67909890 in words is "sixty-seven million, nine hundred nine thousand, eight hundred ninety".