68990438 has 16 divisors (see below), whose sum is σ = 116536320. Its totient is φ = 30347400.

The previous prime is 68990431. The next prime is 68990461. The reversal of 68990438 is 83409986.

It is a junction number, because it is equal to n+sod(n) for n = 68990392 and 68990401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68990431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49898 + ... + 51261.

It is an arithmetic number, because the mean of its divisors is an integer number (7283520).

Almost surely, 2^68990438 is an apocalyptic number.

68990438 is a deficient number, since it is larger than the sum of its proper divisors (47545882).

68990438 is a wasteful number, since it uses less digits than its factorization.

68990438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101203.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 68990438 is about 8306.0482782127. The cubic root of 68990438 is about 410.1376456344.

The spelling of 68990438 in words is "sixty-eight million, nine hundred ninety thousand, four hundred thirty-eight".