74229840 has 120 divisors (see below), whose sum is σ = 251510688. Its totient is φ = 19618560.

The previous prime is 74229829. The next prime is 74229851. The reversal of 74229840 is 4892247.

It is an interprime number because it is at equal distance from previous prime (74229829) and next prime (74229851).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74229795 and 74229804.

It is a congruent number.

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, 93927 + ... + 94713.

Almost surely, 2^74229840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74229840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125755344).

74229840 is an abundant number, since it is smaller than the sum of its proper divisors (177280848).

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

74229840 is a wasteful number, since it uses less digits than its factorization.

74229840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 74229840 is about 8615.6740885435. The cubic root of 74229840 is about 420.2678563483.

The spelling of 74229840 in words is "seventy-four million, two hundred twenty-nine thousand, eight hundred forty".