70978950 has 288 divisors, whose sum is σ = 241725600. Its totient is φ = 15240960.

The previous prime is 70978949. The next prime is 70978991. The reversal of 70978950 is 5987907.

It is a super-2 number, since 2×70978950² = 10076022686205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70978896 and 70978905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1918332 + ... + 1918368.

It is an arithmetic number, because the mean of its divisors is an integer number (839325).

Almost surely, 2^70978950 is an apocalyptic number.

70978950 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70978950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120862800).

70978950 is an abundant number, since it is smaller than the sum of its proper divisors (170746650).

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

70978950 is a wasteful number, since it uses less digits than its factorization.

70978950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 70978950 is about 8424.9005928854. The cubic root of 70978950 is about 414.0408487314.

The spelling of 70978950 in words is "seventy million, nine hundred seventy-eight thousand, nine hundred fifty".