70733640 has 128 divisors (see below), whose sum is σ = 221616000. Its totient is φ = 18044928.

The previous prime is 70733629. The next prime is 70733657. The reversal of 70733640 is 4633707.

70733640 = T₁₂₁₆ + T₁₂₁₇ + ... + T₁₃₀₄.

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 = 70733598 and 70733607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395071 + ... + 395249.

It is an arithmetic number, because the mean of its divisors is an integer number (1731375).

Almost surely, 2^70733640 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 70733640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110808000).

70733640 is an abundant number, since it is smaller than the sum of its proper divisors (150882360).

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

70733640 is a wasteful number, since it uses less digits than its factorization.

70733640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 30.

The square root of 70733640 is about 8410.3293633484. The cubic root of 70733640 is about 413.5633099881.

The spelling of 70733640 in words is "seventy million, seven hundred thirty-three thousand, six hundred forty".