73421478 has 48 divisors (see below), whose sum is σ = 177677136. Its totient is φ = 22589280.

The previous prime is 73421477. The next prime is 73421479. The reversal of 73421478 is 87412437.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73421477) and next prime (73421479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73421471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (3701607).

Almost surely, 2^73421478 is an apocalyptic number.

73421478 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 73421478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88838568).

73421478 is an abundant number, since it is smaller than the sum of its proper divisors (104255658).

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

73421478 is a wasteful number, since it uses less digits than its factorization.

73421478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11651 (or 11639 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 73421478 is about 8568.6333799504. The cubic root of 73421478 is about 418.7367142737.

The spelling of 73421478 in words is "seventy-three million, four hundred twenty-one thousand, four hundred seventy-eight".