61906398 has 8 divisors (see below), whose sum is σ = 123812808. Its totient is φ = 20635464.

The previous prime is 61906357. The next prime is 61906421. The reversal of 61906398 is 89360916.

It is a sphenic number, since it is the product of 3 distinct primes.

61906398 is an admirable number.

It is a super-2 number, since 2×61906398² = 7664804226668808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5158861 + ... + 5158872.

It is an arithmetic number, because the mean of its divisors is an integer number (15476601).

Almost surely, 2^61906398 is an apocalyptic number.

61906398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61906398 is a wasteful number, since it uses less digits than its factorization.

61906398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317738.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 61906398 is about 7868.0618960453. The cubic root of 61906398 is about 395.5898850759.

The spelling of 61906398 in words is "sixty-one million, nine hundred six thousand, three hundred ninety-eight".