73673840 has 40 divisors (see below), whose sum is σ = 172974048. Its totient is φ = 29180160.

The previous prime is 73673839. The next prime is 73673861. The reversal of 73673840 is 4837637.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 73673794 and 73673803.

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, 3770 + ... + 12710.

Almost surely, 2^73673840 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 73673840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86487024).

73673840 is an abundant number, since it is smaller than the sum of its proper divisors (99300208).

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

73673840 is a wasteful number, since it uses less digits than its factorization.

73673840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9057 (or 9051 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 73673840 is about 8583.3466666563. The cubic root of 73673840 is about 419.2159218842.

The spelling of 73673840 in words is "seventy-three million, six hundred seventy-three thousand, eight hundred forty".