73691970 has 64 divisors (see below), whose sum is σ = 194835456. Its totient is φ = 17689280.

The previous prime is 73691963. The next prime is 73691983. The reversal of 73691970 is 7919637.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34267 + ... + 36353.

It is an arithmetic number, because the mean of its divisors is an integer number (3044304).

Almost surely, 2^73691970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73691970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97417728).

73691970 is an abundant number, since it is smaller than the sum of its proper divisors (121143486).

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

73691970 is a wasteful number, since it uses less digits than its factorization.

73691970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215.

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 73691970 is about 8584.4027165552. The cubic root of 73691970 is about 419.2503065962.

It can be divided in two parts, 7369 and 1970, that added together give a palindrome (9339).

The spelling of 73691970 in words is "seventy-three million, six hundred ninety-one thousand, nine hundred seventy".