68152440 has 32 divisors (see below), whose sum is σ = 204457680. Its totient is φ = 18173952.

The previous prime is 68152421. The next prime is 68152457. The reversal of 68152440 is 4425186.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 68152398 and 68152407.

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, 283849 + ... + 284088.

Almost surely, 2^68152440 is an apocalyptic number.

68152440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68152440 is an abundant number, since it is smaller than the sum of its proper divisors (136305240).

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

68152440 is a wasteful number, since it uses less digits than its factorization.

68152440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567951 (or 567947 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 68152440 is about 8255.4491095276. The cubic root of 68152440 is about 408.4702862380.

The spelling of 68152440 in words is "sixty-eight million, one hundred fifty-two thousand, four hundred forty".